Samacheer Kalvi Class 9 Environmental Science Questions - 1

Question: 1

The biodiversity hotspots found in India are

(A) The Himalayas and the Western Ghats

(B) The North – East, the Eastern Ghats and the Himalayas

(C) The Himalayas, the Western Ghats, the North-East and the Nicobar Islands

(D) The Himalayas, the eastern Ghats, the North East and the Nicobar islands

Question: 2

Earthworms are referred as 'Farmer's Friend' because they

(A) Are helpful in elimination of bio wastes

(B) Improve the physical structure of bio wastes

(C) Increase the water holding capacity of the soil

(D) All of these

Question: 3

____ includes plants, animal and all other living organisms.

(A) Biotic factors

(B) Abiotic factors

(C) Biological factors

(D) Physical factors

Question: 4

_____ is a state of inactivity in which the body temperature drops with a lowered metabolic rate during winter.

(A) Hibernation

(B) Echolocation

(C) Aestivation

(D) Nocturnality

Question: 5

All the factors of biosphere which affect the ability of organisms to survive and reproduce are called as

(A) Biotic factors

(B) Abiotic factors

(C) Physical factors

(D) Biological factors

Question: 6

Which of the following is not an adaptation of bat?

(A) Aestivation

(B) Hibernation

(C) Patagium

(D) Echo location

Question: 7

Which two processes of water cycle are affected by dumping plastic on land?

(A) Precipitation and evaporation

(B) Infiltration and Percolation

(C) Sublimation and condensation

(D) Transpiration and condensation

Question: 8

Which one of the following sequence represents the flow of nitrogen in the nitrogen cycle?

(A) Air-soil-plants-animals-soil-air

(B) Air-animals-plants-soil-air

(C) Soil-plants-animals-air-soil

(D) None of these

Question: 9

In opuntia, leaves are modified into spines to

(A) Absorb water from the atmosphere

(B) Reduce consumption of water

(C) Reduce the transpiration rate

(D) Escape from the grazing animals

Question: 10

The atmospheric carbon dioxide enters into the plants through the process of

(A) Assimilation

(B) Respiration

(C) Decomposition

(D) Photosynthesis